we currently have ten comets in 2500 gallon pond , down from 55 comets of ALL sizes a few years ago . we've been feeding '' new life spectrum goldfish'' food . it's about gone and i wondered if there is something better we could buy to try . the growth rate of the comets has been close to zero or at least very slow but color is good . i did a search but surprisingly found little info , which might be due to my lack of skill on the darn computer . also would be interested in suggestions for colorful compatible roommates for the comets for next summer . thanks for your time . . . peace